BioMedical Admissions Test (BMAT) Practice Test 2026 - Free BMAT Practice Questions and Study Guide

The nth term formula typically refers to the formula for the nth term of an arithmetic sequence, which can be expressed as:

\[ a_n = a + (n - 1)d \]

Where:

- \( a_n \) is the nth term,

- \( a \) represents the first term of the sequence,

- \( d \) is the common difference between consecutive terms,

- \( n \) is the term number.

In more simplified terms, the nth term can also be interpreted as being comprised of the first term \( a \) plus some number of common differences \( d \) added together, which indeed forms the basis for the options provided.

When analyzing the choices given, the correct answer being suggested, \( a_n = an + d \), does not reflect the typical format for the nth term of an arithmetic sequence, as it doesn't properly account for the position \( n \) relative to the first term and the increments being applied. However, if we consider a consistent linear growth from the first term, the formula needs to ensure \( n \) multiplies with \( d \) and adds to the initial term as opposed to just adding \( d \) alone.

In contrast, formulas that incorporate \( d \)